Colonies are isolated 4 days after incubation from a skin infection that disseminated in a burn victim. A fungal infection is suspected. Which of the following is a possible organism that may be identified?
a. Epidermophyton floccosum
b. Fusarium spp.
c. Cladosporium spp.
d. Microsporum audouinii
B
The identification of molds is made using a combination of the following: growth rate, colonial morphologic features, and microscopic morphologic features. E. floccosum grows in 7 to 10 days; Cladosporium spp. grows in 6 to 10 days, and M. audouinii grows in 10 to 14 days. Only Fusarium matches the growth rate given—colonies are evident in 2 to 6 days. Fusarium infec-tions are also associated with skin infections caused by burns.
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The C-terminal region of the herpes virus structural protein VP16 transcriptional activation domain was fused to the DNA-binding domain of LexA protein to create a VP16-LexA chimaera
The new gene encoding the VP16-LexA fusion protein was inserted into a plasmid and transferred to yeast, along with a plasmid that contained theGAL1 gene promoter fused to the bacterial ?-galactosidasegene, lacZ. This is experiment A. The new gene encoding the VP16-LexA fusion protein was inserted into a plasmid and transferred to yeast, along with a plasmid that contained theGAL1 gene promoter containing a LexA binding site fused to the bacterial ?-galactosidasegene, lacZ. This is experiment B. Which of the following graphs correctly show the expected levels of GAL1-lacZ fusion gene expression?
Nutrient-rich microenvironments can occur in the open ocean around:
a. viriplankton. b. discarded larvacean houses. c. marine snow. d. b and c
The reduction of the microbial population to levels that are considered safe by public health standards is called ________.
A. disinfection B. antisepsis C. sterilization D. sanitization
A __________ is an area where all precipitation
drains into a specific waterway. Fill in the blank(s) with the appropriate word(s).